2.0 Analysis 2.1 Introduction Because there was no evidence of pre-impact failure of the engine or of pre-impact flight control or aircraft structural failure, the analysis concentrated on weather conditions, aircraft operational deficiencies, and pilot experience. 2.2 Aircraft Operational Deficiencies The aircraft was not registered commercially and was being operated with automotive fuel, which was not approved for this aircraft. The aircraft journey log-book lacked entries for the 48 days preceding the accident. 2.3 Weather Conditions and Pilot Experience Although the pilot was experienced in mountain and glacier flying, weather conditions may have been changing rapidly in the area of the accident. Although there is no evidence to indicate so, it is possible that weather conditions on the glacier may have included the cloud and lighting conditions known to cause whiteout. It could not be determined why the loss of control occurred. 3.0 Conclusions 3.1 Findings The aircraft's weight and centre of gravity position were within limits. The aircraft was not registered for commercial operations. Journey log-book entries had not been made for flights during the 48 days preceding the accident. The pilot was certified and qualified for the flight. It is possible that weather conditions near the accident site may have included cloud and lighting conditions conducive to whiteout. There was no evidence of pre-impact failure of the engine, flight control, or aircraft structural failure. The aircraft struck the ground in a steep nose-down attitude, apparently out of the pilot's control. . It could not be determined why the loss of control occurred. Neither the pilot nor the passengers on the aircraft were suitably dressed for survival in the harsh weather conditions that they would have experienced if a forced landing on the glacier had been necessary. 3.2 Causes The aircraft crashed into the glacier in a steep nose-down attitude, apparently out of the pilot's control. It was not determined what had caused the pilot to lose control of the aircraft. The Board has no aviation safety recommendations to issue at this time.4.0 Safety Action The Board has no aviation safety recommendations to issue at this time.